Saw-setting machine



(No Model.) 3 Sheets-Sheet 1.

T. S. DISSTON.

SAW SETTING MACHINE.

"III";

mm] MIHHHHI II H II I I rave/ 0801 (No Model.) 3 Sheets--Sheet 2. T. S. DISSTON.

SAW SETTING MACHINE.

Patented May 26, 1891.

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1760mm A clysiorv (NoModeL) 3 Sheets-Sheet 3. T. S DISSTON.

SAW SETTING MACHINE.

UNITED STATES PATENT Orr-Ice.

THOMAS S. DISSTON, OF PHILADELPHIA, PENNSYLVANIA.

SAW-SETTIN G MACHINE.

SPECIFICATION forming part of Letters Patent No. 453,040, dated May 26, 1891. Application filed January 19, 1891. Serial No. 378,296. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS S. DISSTON, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Saw-Setting Machines, of which the following is a specification.

My invention relates to machines employed for setting the teeth of saws, and its main object is to construct a machine capable of simultaneously setting alternate teeth in opposite directions, as more fully set forth hereinafter.

In the accompanying drawings, Figure 1 is a plan view of my improved saw-setting machine. Fig. 2 is a transverse sectional elevation on the line 1 2, Fig. 1. Fig. 3 is a transverse sectional elevation on the line 3 4, Fig. 1. Fig. at is a perspective diagram showing the operation of the machine. Fig. 5 is a perspective view of one of the anvils, and Fig. 6 is a view of a modification.

A are the end frames of the machine, secured together by cross-bars B, and mounted in bearings O on the frame is the main longitudinal shaft D, having at one end a conepulley D through the medium of which power is applied tothe machine. On this shaftD isa gear-wheel c, meshing with a gearwheel 0 on the second longitudinal shaft D, adapted to bearings O on the frame A. These two shafts D D carry disks, on which are mounted the tooth-setting hammers, which act to set the teeth alternately in opposite directions.

Secured to the frames A A are guideways E, flared at their outer ends and being of sufficient width to'permit the passage of the fixed saw-blade. The guides are continued through the machine, being cut away at a point Where the hammers act upon the saw, and areprovided with extensions E, which pass under the anvils K and are held by the bolt 7a, which secures the anvil in position.

G is a transverse shaft having one of its bearings in a collar G on a shaft D and the other in a block G adapted to slide on a segment H, secured to one of the cross-bars B of the machine, and mounted on this shaft is a cone F, secured in position 011 the shaft by a collar f, through which passes a clamp-screw f. This cone has a series of radiating teeth f, adapted to engage with the teeth of the saw and cleated to the machine, and is adjustable on its shaft by means of the clamp-screwfi, so that any portion thereof may be brought into the same vertical plane with the guide E, and the machine is thus adapted for the reception of saws having teeth of varying pitch. The teethfof the cone enter the spaces between the teeth of the saw, as may be seen by reference to the drawings. The saw is fed into the machine with the teeth downward, so that as soon as the teeth of the cone engage with those of the saw they feed it regularly and evenly to the hammers. The bearing-block G is adj nstable on the segment H, and is secured thereto in suitable position by a set-screw g, passing through the slot h in the segment, so that when the position of the cone 011 the shaft G is altered the block G may be raised or lowered to permit the teeth of the cone to engage with those of the saw.

On the shaft D is a worm d, engaging with a worm-wheel "i, mounted on a shaft I, having its bearings in brackets on the collar D. At the opposite end of the shaft 1 is a gearwheel 2", the rotations of which are imparted to a pinion on the shaft G through the medium of an idler P.

The feeding device and its driving mechanism are duplicated at the opposite side of the machine, with this difference, that I prefer to drive the feeding-cone from the shaft D instead of from the shaft D, although this is not essential in carrying out my invention. In fact, a second feeding may be dispensed with, although I prefer the use of two feeding devices.

On each side of the machine is a standard J, securely attached to one of the cross-bars B and carrying at its upper end an anvilblock K, as shown more clearly in Fig. 3 and the perspective view, Fig. 5. This anvil-block K is square in shape, and passing through the central orifice therein is a bolt 70, which is tapped into an orifice in the standard J. An extension J of the standard passes up at the back of the anvil K, serving as a brace and taking the greater portion of the strain from the bolt 70.

On one of the bars B is vided with an adj ustinga bracket Ii, proscrewbearing against the rear of the standard J, and by which the ICO anvil may be moved from or toward the saw when adjustment is desired for thick or thin saw-blades, and at the same time the bracket helps to sustain the blows given to the anvil by the setting-hammers. I make the anvils four-sided, as shown in Fig. 5, having beveled portions 71; k inclined to the angle required for the set of the teeth. The object of making the anvil four-sided and reversible is that when one portion of the anvil is worn another can be utilized. Thus, as will be seen on referring to Fig. 5, I am enabled to use eight different portions of the anvil before its working-faces are completely worn away. It will also be noticed that each edge of the anvil has two beveled portions k at different angles, the portion 7r being in line with the first hammer, while the portion k is in line with the second hammer on the same disk, so that as the first hammer strikes the tooth it bends it to a certain extent and the second hammer completes the operation.

Directly opposite the anvil K is a disk M, loosely mounted on the shaft D. This disk is recessed at m m for the hammers N N, which are mounted on arms M, pivoted at n to the disk M. The disk M is adjustably secured by means of a number of screw-bolts m to a slotted disk M fast on the shaft D, so that the disk M and its hammers can be adjusted to strike the blow at the proper time. The hammers in this instance are in the form of rollers ,pivoted at m m to the arms M, so that an even wearing of the whole surface of the hammer is effected. The upward movement of each hammer is limited by a stop P, having a lip j), and in order to adjust the extent of this movement I secure to each arm h a wedge q, one end of which passes between the lip 29 and the edge of the arm M. This wedge is secured in position by a set-screw q, passing through the slot at one end of the wedge, so that it may be adjusted to increase or diminish the space between the lip 19 and the edge of the arm M The arm M is forced out by a suitable spring 3, secured to the disk M and tending to keep the hammer in an extended position, so as to strike the teeth, the spring also serving to take up the recoil after the blow is given. This spring, however, is not at all times necessary, as the hammers are kept in the extended position by centrifugal force when the machine isin full operation. municating directly with it are also duplicated on the shaft D, the anvil and its standard being likewise duplicated. It will be seen that the hammers of the shaft D will strike a blow in one direction and the hammers of the shaft D a blow in the opposite direction, so that as the saw passes through the machine alternate teeth will be set simultaneously in opposite directions. The two arms M on each disk M are not in line with each other, one arm being placed on either side of the disk and the distance between the arms and the hammers being adjusted by The arm M and the mechanism com packing or filling pieces placed between the arms and the disk at the piv'ot'point of the frame.

Situated directly above each of the angles K is a weighted presser-bar S,havin g a grooved guide-plate S, through which the back edge of the saw passes. Thispresser-bar S is guided in suitable ways in an upright T, secured by a bracket to the standard J. The presser has also an extension 15, on which aweight t is placed. The extension 25 passes through a bearing 6 provided with a set-screw t so that if it be desired to secure the presser-bar S in an elevated position the set-screw is turned to bear against the extension t. This adgustable presser-bar is not absolutely essential when setting the teeth of a straight-back sawthat is, a saw in which the back edge is in a parallel line with the teeth-as a simple fixed guide would answer the purpose, but when a curved or tapered back sawis to be setamovable presser-bar is essential to keep the teeth of the saw in engagement with the feed-cone F.

The operation of the machine is as follows:

A saw 00 is passed from the guideway E and pushed through the machine in the direction of the arrow, Fig. 4, untilthe firsttooth comes into engagement with the first feeding-cone F Then as the hammers revolve they will strike the teeth of thesaw,inclining them to a greater or less extent according to the angle of the incline of the anvils. It will be noticed that the hammers of each disk are not in line with each other. The first hammer-that is, thehammern earest the feed-strikes a tooth in such a man-- ner as topress it against that portion of the anvil havingthelesser incline. Then as the saw is fed forward the partially-bent tooth is brought in line with that portion of the anvil having a greater inclination and is struck by the sec ond hammer, and is set to the proper incline. he feeding mechanism is spect to the operation of the hammers that the first set of hammers will strike the first, third, fifth, &c., teeth and bend them in one direction, while the second set of hammers will strike the second, fourth, sixth, &c.,teeth andv bend them in the opposite direction. The blade as it passes through the machine comes into engagement with a secondfeedcone F and is carried by' this feed-cone away from the hammers, after which it is-removed by hand and another saw-blade insertedin its seat.

In Fig. (3 I have shown a modified construction, in which the hammer is mounted in a block M held in radial guides M the extent of outward movement of the hammer being governed by a set screw m and the hammer being held out by a spring at. I

Having thus described my invention, I claim and desire to secure by Letters Patent- 1. The combination, in a machine for setso timed with re ICC ting the teeth of saws, of an anvil, a disk ro of the saw placed upon the anvil,with feeding devices for said saw, substantially as specified.

2. The combination, in a machine for set ting saws, of the anvils situated on the opposite sides of the saw-blade, said anvil having two workingfaces of different inclination, a disk rotated in the same plane with the anvils, said disk carryinghammers on its opposite sides adapted to act successively upon the saw-teeth, substantially as specified.

3. The combination, in a saw-setting machine, of the anvil, a disk rotated in the same plane with the anvil, an arm pivoted to said disk, and a roller carried by said arm and adapted to act as a hammer, substantially as specified.

4. The combination, in a saw-setting machine, of the anvil, the disk rotated in the same plane therewith, hammers carried by the disk, said disk being loose on its shaft, a disk M fixed to the shaft, and devices for adjusting said disks with respect to each other, substantially as specified.

5. The combination, in a saw-setting machine, of an anvil having two faces of different inclination and two hammers in line with such inclined portions and adapted to bend a saw-tooth by placing it in line with the different inclined portions of said anvil successively, substantially as specified.

6. The combination, in a saw-setting machine, of the anvil, a disk rotatedin thesame plane therewith, arms pivoted to said disk, hammers carried by said arms, stop P, and an adj Listing-wedge for regulating the extent of movement of said arms, substantially as specified.

7. An anvil for saw-setting machines,comprising a rectangular block having on each of its edges two or more striking-surfaces of different inclinations, substantially as specified.

8. The combination, in a saw-setting machine, of thelongitudinal shaft, acollar thereon forming a bearing for one endof the feedingshaft, a segment H, a slide therein formin g a bearing for the opposite end of said feedshaft, a toothed cone on said feeding-shaft, with mechanism for driving the same, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS S. DISSTON.

Vitnessesa JNo. E. PARKER, HARRY SMITH. 

